Rose plant named ‘Yohopi’

ABSTRACT

A distinctive cultivar of Hybrid Tea Rose plant named ‘Yohopi’, characterized by its glossy dark green leaves; long, thick and dark red stems that do not have thorns; large dark pink-colored flowers with ruffled petal margins; and good postproduction longevity.

BOTANICAL CLASSIFICATION/CULTIVAR DESIGNATION

Rosa hybrida cultivar Yohopi.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of HybridTea Rose plant, botanically known as Rosa hybrida, commercially producedas a cut flower, and hereinafter referred to by the name ‘Yohopi’.

The new cultivar is a product of a planned breeding program conducted bythe Inventor in Salinas, Calif. The objective of the breeding programwas to develop new cut Rose cultivars with attractive flower petalcolors, long and strong stems, dark green leaves and good postproductionlongevity.

The new cultivar originated from a cross made by the Inventor in 1996 ofan unnamed proprietary selection as the female, or seed, parent with theRose cultivar Laura, not patented, as the male, or pollen, parent. Thecultivar Yohopi was discovered and selected by the Inventor as aflowering plant within the progeny of the stated cross in a controlledenvironment in April, 1998, in Madrid, Cundinamarca, Colombia.

Since December, 1998, asexual reproduction of the new cultivar bygrafting on Rosa Manetti rootstocks in Madrid, Cundinamarca, Colombia,has shown that the unique features of the new cultivar are stable andreproduced true to type in successive generations of asexualreproduction.

SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined tobe the unique characteristics of ‘Yohopi’. These characteristics incombination distinguish the new Hybrid Tea Rose as a new and distinctcultivar:

1. Glossy dark green leaves.

2. Long, thick and dark red stems that do not have thorns.

3. Large dark pink-colored flowers with ruffled petal margins.

4. Good postproduction longevity.

Plants of the Hybrid Tea Rose can be compared to plants of the femaleparent, an unnamed proprietary selection. In side-by-side comparisonsconducted by the Inventor in Salinas, Calif., plants of the new cultivardiffered from plants of the unnamed proprietary selection in thefollowing characteristics:

1. Plants of the new Hybrid Tea Rose do not have thorns whereas plantsof the unnamed proprietary selection have thorns.

2. Plants of the new Hybrid Tea Rose have dark pink-colored flowerpetals whereas plants of the unnamed proprietary selection haveyellow-colored flower petals.

Plants of the Hybrid Tea Rose can be compared to plants of the maleparent, the cultivar Laura. In side-by-side comparisons conducted by theInventor in Salinas, Calif., plants of the new cultivar differed fromplants of the cultivar Laura in the following characteristics:

1. Plants of the new Hybrid Tea Rose have much longer stems than plantsof the cultivar Laura.

2. Plants of the new Hybrid Tea Rose do not have thorns whereas plantsof the cultivar Laura have thorns.

3. Plants of the new Hybrid Tea Rose have dark pink-colored flowerpetals whereas plants of the cultivar Laura have yellow-colored flowerpetals.

Plants of the new Hybrid Tea Rose have not been observed under allpossible environmental conditions. The phenotype may vary significantlywith variations in environment such as temperature, light, water statusand/or fertilizer type and rate, without, however, any variance ingenotype.

BRIEF DESCRIPTION OF PHOTOGRAPH

The accompanying colored photograph illustrates the new Hybrid Tea Roseplant, showing the colors as true as it is reasonably possible to obtainin colored reproductions of this type. Colors in the photograph maydiffer slightly from the color values cited in the detailed botanicaldescription which accurately describe the colors of the new Hybrid TeaRose. The photograph comprises a side perspective view of a typicalflowering stem of the new Hybrid Tea Rose grown in Madrid, Cundinamarca,Colombia.

DETAILED BOTANICAL DESCRIPTION

The following observations and measurements describe cut flowering stemsof plants grown in Madrid, Cundinamarca, Colombia, inpolyethylene-covered greenhouses with day temperatures ranging from 14to 20° C., night temperatures ranging from 4 to 8° C., and light levelsranging from 3,000 to 5,000 foot-candles. Flowering stems used in thephotograph and the description were about 75 days old. In the followingdescription, color references are made to The Royal HorticulturalSociety Colour Chart except where general terms of ordinary dictionarysignificance are used.

Classification:

Botanical.—Rosa hybrida cultivar Yohopi.

Commercial.—Hybrid Tea Rose used as a cut flower.

Parentage:

Female, or seed, parent.—Unnamed Rosa hybrida proprietary selection, notpatented.

Male, or pollen, parent.—Rosa hybrida cultivar Laura, not patented.

Propagation:

Type.—Cuttings grafted onto Rosa Manetti rootstocks.

Plant description:

Form.—Upright; narrow.

Growth habit.—Moderately vigorous.

Height.—About 86 to 96.5 cm.

Diameter.—About 27 cm.

Stem and lateral branches (peduncles).—Lateral branch length: About 86to 96.5 cm. Lateral branch diameter: Base: Thick, about 9 mm. Apex:Thick, about 6.5 mm. Internode length: About 4.25 cm. Texture: Smooth.Strength: Strong. Color: Young: Close to 146A. Mature: Close to 187A.Thorns: None.

Foliage description.—Arrangement: Alternate, compound with typicallythree to five leaflets per leaf. Leaf length, five-leaflet leaves:Terminal leaves: About 7.2 cm. Lateral leaves: About 6.2 cm. Leaf width,five-leaflet leaves: Terminal leaves: About 5.1 cm. Lateral leaves:About 4.3 cm. Leaflet shape: Ovate. Leaflet apex: Acuminate. Leafletbase: Obtuse. Leaflet margin: Sharply serrate. Leaflet texture: Smooth,leathery, glabrous. Petiole length, 5-leaflet leaves: About 9.6 cm.Petiole diameter: At stem attachment: About 5 mm. At base of terminalleaves: About 1.5 mm. Stipules: Quantity: Two at base of petiole.Length: About 2.2 cm. Length of appendages: About 7 mm. Width: About 2mm. Color: Young and mature foliage, upper surface: Much darker than147A, glossy; venation, close to 147A. Young and mature foliage, lowersurface: Closest to 147B; venation, close to 147B to 147C. Petiole:Upper surface: Close to 59A. Lower surface: Close to 146A; nodes, closeto 59A. Stipule, upper surface: Much darker than 147A. Stipule, lowersurface: Closest to 147B.

Flower description:

Flower type and habit.—Large dark pink flowers. Consistently symmetricalrosette flowers. Freely and recurrent flowering. Flowers arranged singlyat terminal apices. Flowers persistent.

Flowering season/time to flower.—Year-round under greenhouse conditions.Depending on environmental conditions and season, time to flower isabout 75 days.

Flower diameter, fully opened.—About 13.5 cm.

Flower depth (height), fully opened.—About 7.2 cm.

Flower longevity as a cut flower.—At least 8 to 10 days.

Fragrance.—None detected.

Flower buds.—Shape: Ovoid. Length: About 5.3 cm. Color: 144A.

Petals and petaloids.—Petaloids vary in size, but similar to petals inshape and coloration. Quantity: About 28. Length, outer petals: About7.8 cm. Width, outer petals: About 7.2 cm. Shape: Roughly obovate. Apex:Emarginate. Base: Obtuse. Margin: Mostly entire with slightemargination, ruffled appearance. Texture: Smooth, velvety. Color: Whenopening, upper and lower surfaces: Closest to, but more intense than63A. Fully opened, upper and lower surfaces: Closest to 63A to 67A;occasional yellow, 7A, central stripe towards base; petal color fadingto close to 67A with subsequent development.

Sepals.—Quantity: Five. Length: About 4.8 cm. Diameter: About 1.3 cm.Shape: Sharply lanceolate. Apex: Elongated, acuminate. Base: Fused atreceptacle. Margin: Ciliate with occasional sharply acuminateappendages. Texture: Upper surface, pubescent; lower surface, slightlypubescent. Color: Upper surface: Closest to 144B. Lower surface: 144Awith central longitudinal stripe, 59A.

Reproductive organs.—Stamens: Quantity: About 132 per flower. Antherlength: About 2 mm. Anther diameter: About 1 mm. Anther shape: Cordate,concave. Anther color: Close to 9A. Filament length: About 2 mm.Filament color: Close to 9A. Pollen amount: Scarce. Pollen color: Closeto 17A. Pistils: Quantity: About 98 per flower. Pistil length: About 1cm. Style color: Close to 45A. Stigma shape: Bi-lobed. Stigma color:Close to 5D. Ovary color: 145D to 155D. Receptacle height: About 1.4 cm.Receptacle diameter: About 1.8 cm. Receptacle texture: Smooth.Receptacle color: 144A.

Seed.—None observed.

Disease resistance: Plants of the new Hybrid Tea Rose have been observedto be somewhat resistant to Powdery Mildew.

It is claimed:
 1. A new and distinct Hybrid Tea Rose plant named‘Yohopi’,